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A recovery method of platinum crucible for relaxation ferroelectric single crystal growth

A relaxor ferroelectric single crystal and platinum crucible technology is applied in the field of recycling platinum crucibles for relaxor ferroelectric single crystal growth, and can solve problems such as leaky crucibles for single crystal growth, inability to clean crystal impurities, and decrease in platinum purity.

Active Publication Date: 2021-11-19
江苏蓝鲸新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a recovery method for the platinum crucible used for the growth of a relaxor ferroelectric single crystal, to overcome the defects in the prior art and improve the recovery quality of the platinum crucible. Recycling high-purity metal platinum flakes from platinum crucible fragments can effectively solve the problem that the current platinum crucible recycling technology cannot clean the crystal impurities existing in the platinum crucible, and can achieve the purpose of effectively controlling the impurity content in the recycled platinum crucible, thereby Avoid the reduction of platinum purity caused by the recycling of platinum crucibles, which will affect the subsequent single crystal growth leaky crucible

Method used

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  • A recovery method of platinum crucible for relaxation ferroelectric single crystal growth

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Experimental program
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Effect test

Embodiment 1

[0030] Recycling of platinum crucibles without corroded leaky crucibles:

[0031] (1) Flatten the platinum crucible fragments and cut them into long strips with basically the same length. Use a hard brush to wipe the surface of the platinum crucible fragments in deionized water, and try to remove the impurities stuck on the surface. If there are hard single crystal impurities, you can use an alumina ceramic rod to gently poke them off. For those that cannot be removed must not be forcibly removed to prevent loss of platinum. After cleaning, rinse again with deionized water and dry.

[0032] (2) Soak the platinum crucible fragments cleaned in step (1) in a 1:1 hydrofluoric acid solution for 150 hours. During the soaking process, the platinum crucible fragments should be turned every 24 hours to ensure the acid bubble effect. After soaking, use a hard brush to clean impurities, and then use deionized water to ultrasonically clean, specifically: room temperature, frequency 40KH...

Embodiment 2

[0037] For recovery of platinum crucibles with slightly corroded leaky crucibles:

[0038](1) Flatten the platinum crucible fragments and cut them into long strips with basically the same length. Use a hard brush to wipe the surface of the platinum crucible fragments in deionized water, and try to remove the impurities stuck on the surface. If there are hard single crystal impurities, you can use an alumina ceramic rod to gently poke them off. For those that cannot be removed must not be forcibly removed to prevent loss of platinum. After cleaning, rinse again with deionized water and dry;

[0039] (2) Soak the platinum crucible fragments cleaned in step (1) in a 1:1 hydrofluoric acid solution for 180 hours. During the soaking process, the platinum crucible fragments should be turned every 24 hours to ensure the acid bubble effect. After soaking, use a hard brush to clean impurities, and then use deionized water to ultrasonically clean, specifically: room temperature, freque...

Embodiment 3

[0045] For recovery of platinum crucibles with severely corroded leaky crucibles:

[0046] (1) Flatten the platinum crucible fragments and cut them into long strips with basically the same length. Use a hard brush to wipe the surface of the platinum crucible fragments in deionized water, and try to remove the impurities stuck on the surface. If there are hard single crystal impurities, you can use an alumina ceramic rod to gently poke them off. For those that cannot be removed must not be forcibly removed to prevent loss of platinum. After cleaning, rinse again with deionized water and dry.

[0047] (2) Soak the platinum crucible fragments cleaned in step (1) in a 1:1 hydrofluoric acid solution for 200 hours. During the soaking process, the platinum crucible fragments should be turned every 24 hours to ensure the acid bubble effect. After soaking, use a hard brush to clean impurities, and then use deionized water to ultrasonically clean, specifically: room temperature, frequ...

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Abstract

The invention discloses a recovery method of a platinum crucible for the growth of a relaxor ferroelectric single crystal. Slightly polluted platinum crucibles after electric single crystal growth are recycled and processed. After treatment with cold acid and hot acid, the single crystal material remaining on the surface of the platinum crucible can be effectively removed; after hydrogen oxyflame burning and high-frequency induction melting, the single crystal impurities entering the interior of the platinum crucible can be removed, and finally higher Pure platinum material. The method of the invention has high recovery rate, high platinum purity and good processing performance, and the platinum crucible processed by using the platinum material recovered by the method has a low leak rate in the crystal growth process.

Description

technical field [0001] The invention belongs to the technical field of metal recovery, and in particular relates to a recovery method of a platinum crucible for growth of a relaxor ferroelectric single crystal. Background technique [0002] The crucible drop method is the main method for growing relaxor ferroelectric single crystals. After each single crystal growth is completed, the platinum crucible will be stripped into pieces to take out the single crystal. The surface of the fragments of these platinum crucibles often has single crystal adhesive residues, and the platinum fragments in some places may also have the reactants of the corrosion reaction between platinum and the single crystal, and even a small amount of platinum fragments may remain inside due to power outages and other reasons. single crystal impurities. These impurities reduce the purity of the platinum crucible fragments, and if they are not removed during the recycling process, they will be left behind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B11/02C22B1/00C23G1/10C23G5/00
CPCC22B1/005C22B11/021C23G1/10C23G5/00
Inventor 郭海生宋克鑫王富贵徐卓李飞栾鹏庄永勇
Owner 江苏蓝鲸新材料有限公司
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